APA Style
      Gill, T, L., Zachary, W, W. (2016).
    Functional Analysis and the Feynman Operator Calculus .
    Cham:
  Springer.
  
MLA Style
      Gill, Tepper, L.., Zachary, Woodford, W..
    "Functional Analysis and the Feynman Operator Calculus".
    
    Cham:
  Springer,
  2016.
  Text.